How To Fix DT018 - If activation was successful, adjust C structures (where necessary)

SAP Error Message - Details

• Message type: E = Error

• Message class: DT - Table activation (incl. indexes)

• Message number: 018

• Message text: If activation was successful, adjust C structures (where necessary)

What causes this issue?

This is a table of activation type 02. Such tables are used in C
programs. These C structures must be adjusted to any changes in the
table definition.

System Response

Pure information.

How to fix this error?

Adjust the C structures in which the table is used if necessary.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DT018 - If activation was successful, adjust C structures (where necessary) ?

  The SAP error message DT018 typically occurs during the activation of a Data Dictionary object, such as a table or a structure. This error indicates that there is a mismatch between the data structure defined in the ABAP Dictionary and the corresponding C structures in the underlying database or in the ABAP program.
  Cause:
  
  Data Type Mismatch: The data types defined in the ABAP Dictionary do not match the expected data types in the underlying database or in the ABAP program.
  Field Length Issues: The length of fields defined in the ABAP Dictionary may not match the lengths expected in the database or in the C structures.
  Changes in Structure: If there have been changes to the structure of a table or a data element, and the corresponding C structures have not been updated, this can lead to this error.
  Inconsistent Activation: If the activation of the object was partially successful, it may leave the system in an inconsistent state.
  
  Solution:
  
  Check Data Types and Lengths: Review the data types and lengths of the fields in the ABAP Dictionary and ensure they match the expected definitions in the database or C structures.
  Adjust C Structures: If necessary, adjust the C structures to align with the definitions in the ABAP Dictionary. This may involve modifying the structure definitions in the ABAP program or database.
  Re-activate the Object: After making the necessary adjustments, try to re-activate the object in the ABAP Dictionary.
  Check for Dependencies: Ensure that there are no dependencies or references to the object that may be causing the issue. If there are dependent objects, they may also need to be adjusted or re-activated.
  Use Transaction SE11: You can use transaction SE11 (Data Dictionary) to check the definitions of the objects involved and make any necessary changes.
  Consult SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance.
  
  Related Information:
  
  Transaction Codes: SE11 (Data Dictionary), SE14 (Database Utility), SE37 (Function Module), SE80 (Object Navigator).
  ABAP Dictionary: The ABAP Dictionary is a central repository for all data definitions in an SAP system, including tables, views, data elements, domains, and more.
  C Structures: These are typically used in the context of ABAP programs and can be affected by changes in the Data Dictionary.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.